geometry

American  

[jee-om-i-tree] / dʒiˈɒm ɪ tri /

noun

plural

geometries

1. Mathematics. the branch of mathematics that deals with the deduction of the properties, measurement, and relationships of points, lines, angles, and figures in space from their defining conditions by means of certain assumed properties of space.

2. Mathematics. any specific system of the branch of mathematics describing points, lines, angles, and figures in space, that operates in accordance with a specific set of assumptions.

   Euclidean geometry.

3. Mathematics. the study of the branch of mathematics that describes points, lines, angles, and figures in space.

4. Mathematics. a book on the subject of the branch of mathematics that describes points, lines, angles, and figures in space, especially a textbook.

5. the shape or form of a surface or solid.

6. a design or arrangement of objects in simple rectilinear or curvilinear form.

7. Digital Technology. the polygons that constitute the building blocks of every object or environment in a video game.

   Player characters getting stuck in geometry is a common glitch in 3D games.

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geometry British  

/ dʒɪˈɒmɪtrɪ /

noun

1. the branch of mathematics concerned with the properties, relationships, and measurement of points, lines, curves, and surfaces See also analytical geometry non-Euclidean geometry

2. 1. any branch of geometry using a particular notation or set of assumptions

      analytical geometry

   2. any branch of geometry referring to a particular set of objects

      solid geometry

3. a shape, configuration, or arrangement

4. arts the shape of a solid or a surface

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geometry Scientific  

/ jē-ŏm′ĭ-trē /

1. The mathematical study of the properties, measurement, and relationships of points, lines, planes, surfaces, angles, and solids.

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geometry Cultural  

1. The branch of mathematics that treats the properties, measurement, and relations of points, lines, angles, surfaces, and solids. (See Euclid and plane geometry.)

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Etymology

Origin of geometry

First recorded in 1300–50; Middle English gemetri(e), from Old French geometrie, from Latin geōmetria, from Greek geōmetría; see geo-, -metry

Explanation

Geometry is the part of mathematics that deals with calculating the distance around a circle, the angles that make up a triangle, or the amount of room inside a cube. If it involves measuring space, it’s probably geometry. The Greek roots of geometry literally mean “to measure earth,” and over 5000 years ago farmers started using geometry to figure out how much land they owned. You study geometry in school, and you use it all the time, like calculating the best angle to cut a piece of wood for a birdhouse, or when playing a game of pool. Astronomers use geometry to measure planets millions of miles away—much easier than finding a ruler that big.

Example Sentences

Geometry competes with sensuous paint-handling and lush color.

From The Wall Street Journal • Oct. 11, 2025

Diggs-Chavis described herself on her website as a “master energy healer” who “uses Sacred Geometry and Sound Healing to successfully change lives.”

From Los Angeles Times • Aug. 23, 2024

In 1976, Simons received the American Mathematical Society’s Oswald Veblen Prize in Geometry for research that would prove to be influential to string theory and other areas of physics.

From Seattle Times • May 10, 2024

Alexander Kasprzyk is Associate Professor in Geometry in the School of Mathematical Sciences at the University of Nottingham and was one of the authors on the paper.

From Science Daily • Sep. 25, 2023

I heard it in English and Geometry: “Did you see her?”

From "Stargirl" by Jerry Spinelli

Related Words

• algebra
• calculation
• calculus
• math